Hello
Here are some steps you can try to resolve the “0x8a15000f : Data required by the source is missing” error:
Verify you can access the sources: Copy the source URLs from the winget sources list command and try accessing them in the browser.
Update your Winget sources: Run the command winget source update to force Winget to update information for all package sources.
Change region in Windows settings: If your local CDN is having an issue, you can try changing the region in your Windows settings.
Re-register the Winget package: Run the following command in an elevated PowerShell window to re-register the package:
Add-AppxPackage -DisableDevelopmentMode -Register "C:\Program Files\WindowsApps\Microsoft.Winget.Source_2021.718.1322.843_neutral__8wekyb3d8bbwe\AppXManifest.xml" -Verbose
Perform a complete system shutdown: Close all the core services and then try to run Winget. You can do this by running the following command in the Command Prompt with administrator privileges:
shutdown /s /f /t 0
Reopen Winget in the Terminal App: Completely close the Command Prompt or PowerShell instance you are running on the PC. You can use the Task Manager to stop an unresponsive instance of either of these command-line tools. After that, open Command Prompt or PowerShell with administrator privileges on your system. Type Winget and press the Enter key to check if Winget works now.